FWIW pre-paid mobile services in the U.S. are all pretty much useless. I do not think that T-mobile will be any better, although they do have one of the higher pre-paid subscriber bases, as a percentage of their total number of sunscribers. The percentage of pre-paid subscribers is much lower here in the U.S., and the services have been targeted mostly at high credit risk customers. In most of the rest of the GSM world pre-paid services are fantastic.